Relation and function
Find total number of one one function from set A to A if A={1,2,3,4}
A bag consists of 5 black marbles and some white marbles. The probability of selecting 2 white
marbles from that is 2/9. find number of white marbles.
Show that if the diagonals
of a quadrilateral bisect each other at right angles then it is a rhombus
An Ap consists of 21 terms.the sum of three terms in the middle is 129 and the last three terms is 237.find the A.P